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86’ Yamaha XJ700-X - Valve Shims

Discussion in 'XJ Technical Chat' started by Shelby Biggs, Apr 4, 2025 at 12:36 AM.

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  1. Shelby Biggs

    Shelby Biggs New Member

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    Howdy, plan on pulling valve cover to check clearances this weekend on a new to me 1986 XJ700X - 18k miles - I had an 85 xj700 air head that was very simple to check and shim but I have a feeling I’m not going to be afforded the same luxury with this bike. Is there anything I should study up on before jumping into this if I need to change shims out? Advice? Instructions? Thank you in advance.
     
    Shelby Biggs, Apr 4, 2025 at 12:36 AM
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  2. Simmy

    Simmy Well-Known Member

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    The cam shafts need to come out to change shims. Make sure you have a manual
    You got this!
     
    Simmy, Apr 4, 2025 at 7:53 AM
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  3. Robert Strumbell

    Robert Strumbell New Member

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    Dont over toque bearing caps or valve cover bolts. There is dowl sleeves on caps, dont drop them down chain gallies or spark plug holes.
     
    Robert Strumbell, Apr 4, 2025 at 5:03 PM
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  4. Timbox

    Timbox Well-Known Member

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    Have done one of these yrs ago, why I pass them up now for flipping. You will need a manual for sure as stated above. Make sure you do the math and check it a couple of times. You don't want to have to go back and removed the cams until the next service cycle. Good luck.
     
    Timbox, Apr 5, 2025 at 7:44 AM
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  5. Shelby Biggs

    Shelby Biggs New Member

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    Thanks guys - found this guy on YouTube and is seems like a great resource/visual walkthrough for this specific job. He also has carb rebuild videos for the Mikuni BS33-34s.

    www.youtube.com/@dwood2066
     
    Shelby Biggs, Apr 5, 2025 at 8:14 AM
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